<?php
/**
 * CNumberValidator class file.
 *
 * @author Qiang Xue <qiang.xue@gmail.com>
 * @link http://www.yiiframework.com/
 * @copyright 2008-2013 Yii Software LLC
 * @license http://www.yiiframework.com/license/
 */

/**
 * CNumberValidator validates that the attribute value is a number.
 *
 * In addition to the {@link message} property for setting a custom error message,
 * CNumberValidator has a couple custom error messages you can set that correspond to different
 * validation scenarios. To specify a custom message when the numeric value is too big,
 * you may use the {@link tooBig} property. Similarly with {@link tooSmall}.
 * The messages may contain additional placeholders that will be replaced
 * with the actual content. In addition to the "{attribute}" placeholder, recognized by all
 * validators (see {@link CValidator}), CNumberValidator allows for the following placeholders
 * to be specified:
 * <ul>
 * <li>{min}: when using {@link tooSmall}, replaced with the lower limit of the number {@link min}.</li>
 * <li>{max}: when using {@link tooBig}, replaced with the upper limit of the number {@link max}.</li>
 * </ul>
 *
 * @author Qiang Xue <qiang.xue@gmail.com>
 * @package system.validators
 * @since 1.0
 */
class CNumberValidator extends CValidator
{
    /**
     * @var boolean whether the attribute value can only be an integer. Defaults to false.
     */
    public $integerOnly = false;
    /**
     * @var boolean whether the attribute value can be null or empty. Defaults to true,
     * meaning that if the attribute is empty, it is considered valid.
     */
    public $allowEmpty = true;
    /**
     * @var integer|float upper limit of the number. Defaults to null, meaning no upper limit.
     */
    public $max;
    /**
     * @var integer|float lower limit of the number. Defaults to null, meaning no lower limit.
     */
    public $min;
    /**
     * @var string user-defined error message used when the value is too big.
     */
    public $tooBig;
    /**
     * @var string user-defined error message used when the value is too small.
     */
    public $tooSmall;
    /**
     * @var string the regular expression for matching integers.
     * @since 1.1.7
     */
    public $integerPattern = '/^\s*[+-]?\d+\s*$/';
    /**
     * @var string the regular expression for matching numbers.
     * @since 1.1.7
     */
    public $numberPattern = '/^\s*[-+]?[0-9]*\.?[0-9]+([eE][-+]?[0-9]+)?\s*$/';


    /**
     * Validates the attribute of the object.
     * If there is any error, the error message is added to the object.
     * @param CModel $object the object being validated
     * @param string $attribute the attribute being validated
     */
    protected function validateAttribute($object, $attribute)
    {
        $value = $object->$attribute;
        if ($this->allowEmpty && $this->isEmpty($value))
            return;
        if (!is_numeric($value)) {
            // https://github.com/yiisoft/yii/issues/1955
            // https://github.com/yiisoft/yii/issues/1669
            $message = $this->message !== null ? $this->message : Yii::t('yii', '{attribute} must be a number.');
            $this->addError($object, $attribute, $message);
            return;
        }
        if ($this->integerOnly) {
            if (!preg_match($this->integerPattern, "$value")) {
                $message = $this->message !== null ? $this->message : Yii::t('yii', '{attribute} must be an integer.');
                $this->addError($object, $attribute, $message);
            }
        } else {
            if (!preg_match($this->numberPattern, "$value")) {
                $message = $this->message !== null ? $this->message : Yii::t('yii', '{attribute} must be a number.');
                $this->addError($object, $attribute, $message);
            }
        }
        if ($this->min !== null && $value < $this->min) {
            $message = $this->tooSmall !== null ? $this->tooSmall : Yii::t('yii', '{attribute} is too small (minimum is {min}).');
            $this->addError($object, $attribute, $message, array('{min}' => $this->min));
        }
        if ($this->max !== null && $value > $this->max) {
            $message = $this->tooBig !== null ? $this->tooBig : Yii::t('yii', '{attribute} is too big (maximum is {max}).');
            $this->addError($object, $attribute, $message, array('{max}' => $this->max));
        }
    }

    /**
     * Returns the JavaScript needed for performing client-side validation.
     * @param CModel $object the data object being validated
     * @param string $attribute the name of the attribute to be validated.
     * @return string the client-side validation script.
     * @see CActiveForm::enableClientValidation
     * @since 1.1.7
     */
    public function clientValidateAttribute($object, $attribute)
    {
        $label = $object->getAttributeLabel($attribute);

        if (($message = $this->message) === null)
            $message = $this->integerOnly ? Yii::t('yii', '{attribute} must be an integer.') : Yii::t('yii', '{attribute} must be a number.');
        $message = strtr($message, array(
            '{attribute}' => $label,
        ));

        if (($tooBig = $this->tooBig) === null)
            $tooBig = Yii::t('yii', '{attribute} is too big (maximum is {max}).');
        $tooBig = strtr($tooBig, array(
            '{attribute}' => $label,
            '{max}' => $this->max,
        ));

        if (($tooSmall = $this->tooSmall) === null)
            $tooSmall = Yii::t('yii', '{attribute} is too small (minimum is {min}).');
        $tooSmall = strtr($tooSmall, array(
            '{attribute}' => $label,
            '{min}' => $this->min,
        ));

        $pattern = $this->integerOnly ? $this->integerPattern : $this->numberPattern;
        $js = "
if(!value.match($pattern)) {
	messages.push(" . CJSON::encode($message) . ");
}
";
        if ($this->min !== null) {
            $js .= "
if(value<{$this->min}) {
	messages.push(" . CJSON::encode($tooSmall) . ");
}
";
        }
        if ($this->max !== null) {
            $js .= "
if(value>{$this->max}) {
	messages.push(" . CJSON::encode($tooBig) . ");
}
";
        }

        if ($this->allowEmpty) {
            $js = "
if(jQuery.trim(value)!='') {
	$js
}
";
        }

        return $js;
    }
}
